1 files changed, 105 insertions, 0 deletions
diff --git a/storage/tokudb/PerconaFT/src/tests/test_insert_many_gc.cc b/storage/tokudb/PerconaFT/src/tests/test_insert_many_gc.cc
new file mode 100644
index 00000000000..8e5109cd2a9
--- /dev/null
+++ b/storage/tokudb/PerconaFT/src/tests/test_insert_many_gc.cc
@@ -0,0 +1,105 @@
+/* -*- mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*- */
+// vim: ft=cpp:expandtab:ts=8:sw=4:softtabstop=4:
+#ident "$Id$"
+/*======
+This file is part of PerconaFT.
+
+
+Copyright (c) 2006, 2015, Percona and/or its affiliates. All rights reserved.
+
+    PerconaFT is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License, version 2,
+    as published by the Free Software Foundation.
+
+    PerconaFT is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with PerconaFT.  If not, see <http://www.gnu.org/licenses/>.
+
+----------------------------------------
+
+    PerconaFT is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License, version 3,
+    as published by the Free Software Foundation.
+
+    PerconaFT is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with PerconaFT.  If not, see <http://www.gnu.org/licenses/>.
+======= */
+
+#ident "Copyright (c) 2006, 2015, Percona and/or its affiliates. All rights reserved."
+
+#include "test.h"
+
+
+static void test_insert_many_gc(void) {
+    int r;
+
+    DB_ENV *env;
+    r = db_env_create(&env, 0); CKERR(r);
+    r = env->set_cachesize(env, 1, 0, 1); CKERR(r); // 1gb cache so this test fits in memory
+    r = env->open(env, TOKU_TEST_FILENAME, DB_CREATE+DB_PRIVATE+DB_INIT_MPOOL+DB_INIT_TXN, 0); CKERR(r);
+
+    DB *db;
+    r = db_create(&db, env, 0); CKERR(r);
+    r = db->open(db, NULL, "db", NULL, DB_BTREE, DB_CREATE, 0666); CKERR(r);
+
+    const int val_size = 1 * 1024 * 1024;
+
+    // Begin a snapshot transaction, which should prevent simple garbage collection
+    // from being effective. Only full garbage collection can prevent many inserts
+    // into a single leaf node from growing out of control.
+    DB_TXN *snapshot_txn;
+    r = env->txn_begin(env, NULL, &snapshot_txn, DB_TXN_SNAPSHOT); CKERR(r);
+
+    DBT key;
+    int k = 0;
+    dbt_init(&key, &k, sizeof(k));
+
+    DBT val;
+    char *XMALLOC_N(val_size, val_buf);
+    memset(val_buf, 0, val_size);
+    dbt_init(&val, val_buf, val_size);
+
+    // Keep overwriting the same row over and over.
+    const int N = 75;
+    for (int i = 0; i < N; i++) {
+        r = db->put(db, NULL, &key, &val, 0); CKERR(r);
+    }
+
+    // Full garbage collection should have prevented the leaf node
+    // from having an MVCC stack of size 'N'. At the time of this
+    // writing, we run full GC on leaf-inject when the leaf is
+    // 32mb or larger. A good invariant is that the max LE size
+    // never grew larger than 35mb and that the max commited xr stack
+    // length never exceeded 35
+    const uint64_t le_max_memsize = get_engine_status_val(env, "LE_MAX_MEMSIZE");
+    const uint64_t le_max_committed_xr = get_engine_status_val(env, "LE_MAX_COMMITTED_XR");
+    invariant(le_max_memsize <= 35 * 1024 * 1024);
+    invariant(le_max_committed_xr <= 35);
+
+    r = snapshot_txn->commit(snapshot_txn, 0); CKERR(r);
+
+    toku_free(val_buf);
+    r = db->close(db, 0); CKERR(r);
+    r = env->close(env, 0); CKERR(r);
+}
+
+int
+test_main(int argc, char *const argv[]) {
+    parse_args(argc, argv);
+
+    toku_os_recursive_delete(TOKU_TEST_FILENAME);
+    int r = toku_os_mkdir(TOKU_TEST_FILENAME, S_IRWXU+S_IRWXG+S_IRWXO); CKERR(r);
+
+    test_insert_many_gc();
+
+    return 0;
+}